Welcome to DC! I also have no suggestions but bet gummies would be a lot of fun to create and sell. I also bet you have done a lot of research online. If in your shoes, I would likely start with researching reviews of gummy makers or look into some candy-making classes at the community college....or just find some online recipes and tweak them to see if I can find desired results!
I hope you stick around and share your growth in making your gummies. If you need a suggestion on where to start, I so love those Gummy Peach Rings!